/*
 * Copyright [2025] [Harbortek Corp.]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.harbortek.helm.scm.utils;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;

import java.io.IOException;
import java.nio.charset.Charset;

public class OAuth2AuthenticationInterceptor implements ClientHttpRequestInterceptor {
    private final String token;


    /**
     * Create a new interceptor which adds Basic Authentication for the
     * given token.
     * @see HttpHeaders#setBasicAuth(String, String)
     * @see HttpHeaders#encodeBasicAuth(String, String, Charset)
     */
    public OAuth2AuthenticationInterceptor(String token) {
       this.token = token;
    }

    @Override
    public ClientHttpResponse intercept(
            HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {

        HttpHeaders headers = request.getHeaders();
        if (!headers.containsKey(HttpHeaders.AUTHORIZATION)) {
            headers.setBearerAuth(token);
        }
        return execution.execute(request, body);
    }
}
